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2 Layer Flex Printed Circuit Board (FPC) Built On Polyimide for Microstrip Antenna

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Shenzhen Bicheng Electronics Technology Co., Ltd

Contact name
Kevin Liao

Quick Information

  • Brand Name: Bicheng Enterprise Limited
  • Place of Origin: China
  • Model Number : BIC-0304-V3.04
  • Base Material : Polyimide 25μm + 0.3mm stiffener of stainless steel
  • Board Thickness : 0.20mm
  • Copper Thickness : 70um
  • Min. Hole Size : N/A
  • Min. Line Spacing : N/A
  • Min. Line Width : N/A
  • Surface Finishing : Immersion gold
  • Solder Mask Color : Yellow
  • Colour of Component : White
  • Test : 100% Electrical Test


Structure of FPC
According to the number of layers of conductive copper foil, FPC can be divided into single layer circuit, double layer circuit, multi-layer circuit, double sided and so on. 

Single-layer structure: the flexible circuit of this structure is the simplest structure of the flexible PCB. Usually the base material (dielectric substrates) + transparent rubber(adhesive) + copper foil is a set of purchased raw materials(semi-manufactures), the protective film and transparent glue are another kind of bought raw material. First, copper foil must be etched to obtain the required circuit, and the protective film should be drilled to reveal the corresponding pad. After cleaning, the two are combined by rolling. Then the exposed part of the pad electroplated gold or tin to protect. In this way, the big panel board will be ready. Generally also it’s stamped into the corresponding shape of the small circuit board. There is also no protective film directly on the copper foil, but printed resistance soldering coating, so that the cost will be lower, but the mechanical strength of the circuit board will become worse. Unless the strength requirement is not high and the price needs to be as low as possible, it is best to apply the protective film method. 

Double layer structure: when the circuit is too complex to be wired, or copper foil is needed to shield the ground, it is necessary to choose a double layer or even a multilayer. The most typical difference between a multilayer and a single plate is the addition of a perforated structure to connect the layers of copper foil. The first process of transparent rubber + base material + copper foil is to make holes. Drill holes in the base material and copper foil first, clean and then plated with a certain thickness of copper. The subsequent fabrication process is almost the same as the single-layer circuit. 

Double sided structure: both sides of the double sided FPC have pads, mainly used to connect other circuit boards. Although it and monolayer structure is similar, but the manufacturing process is very different. Its raw material is copper foil, protective film and transparent glue. The protective film should be drilled according to the position of the pad first, then the copper foil should be affixed, the pad and track lines should be etched and then the protective film of another drilled hole should be affixed.

FPC Case: 2 Layer Flex Printed Circuit Board (FPC) Built on Polyimide for Microstrip Antenna
(Flexible printed circuits are custom-made products, the picture and parameters shown are just for reference)

General description
This is a type of 2 Layer flexible printed circuit (FPC) built on polyimide for the application of Microstrip Antenna.

Basic specifications
Base material: Polyimide 25μm + 0.3mm stiffener of stainless steel
Layer count: 2 layers
Type: Individual FPC
Format: 205mm x 74mm = 1 type = 1 piece
Surface finish: Immersion gold
Copper weight: Outer layer 70 μm/ Inner layer 0 μm
Solder mask / Legend: Yellow coverlay / white
Final PCB height: 0.20 mm
Standard: IPC 6012 Class 2
Packing: 100 pieces are packed for shipment. 
Lead time: 10 working days
Shelf life: 6 months

Features and benefits    
The end can be whole soldered;
Continuity of processing;
Low cost;
Delivery on time higher than 98% on-time-delivery rate;
Comprehensive equipment management and maintenance and process control;
RoHS materials;
Eligible products rate of first production: >95%  
Diversified shipping method: FedEx, DHL, TNT, EMS

Keypad FPC, mobile phone module flex board, mobile phone module flex board    Toy lamp strip, industrial surveying and mapping instrument, Consumer electrostatic Bracelet soft board.

General Properties of 2 Layer FCCL

Double side adhesiveless flexible copper clad laminate (SF202)
Test Item Treatment Condition Unit Property Date
IPC Standard * value Typical Value
SF202 0512DT SF202 1012DT
Peel Strength (90º) A N/mm ≥0.525 1.2  1.4
288℃, 5s ≥0.525 1.2  1.4
Folding Endurance (MIT) R0.8 X 4.9N Times - >80 >50
Thermal Stress 288℃, 20s - - No delamination No delamination
Dimensional Stability MD E-0.5/150 % ±0.2 ±0.05 ±0.05
TD ±0.05 ±0.05
Chemical Resistance After Chemical Exposure % ≥80 >85 >85
Dielectric Constant (1MHz) C-24/23/50 - ≤4.0 3.2 3.3
Dissipation Factor (1MHz) C-24/23/50 - ≤0.01 0.007 0.008
Volume Resistvitiy C-96/35/90 MΩ-cm ≥10^6 4.5 x 10^8 3.5 x 10^8
Surface Resistance C-96/35/90 ≥10^5 1.5 x 10^6 2.0 x 10^6
Explanations: C = Humidity conditioning;
  E = Temperature conditioning;
  * Certified to IPC-4204/25 Copper Clad Adhesiveless, Cast and Curied Polyimide
Product Code Description  
  SF202 05 12 D T
  SF202: Shengyi Adhesiveless FCCL Designation
  05: PI Film Thickness, 05- 12.5µm; 08-20µm
  12: Copper Foil Thickness, 12-12µm, 18-18µm
  D: Double Sided
  T:RTF copper; R- RA Copper; E- ED copper

Why choose us? 
1) Focus on your core competencies: We’ve deeply known it is full of fierce competition for our customers in the market. You can focus on such important competencies as research and development, sales and marketing based on our professional performance and skilled services that exceeding your expectation.

2) Cutting-edge technology: it is rational for a small and medium-sized customer to hanker after the latest equipment and manufacturing expertise for its PCBs. By the partnerships
with Bicheng PCB, you gain access to reach your expectation with our 3 factory bases with over 26,000 square meters.

4) Save the cost of production: Production cost is one of the key points of our customers’ product competitiveness. Bicheng PCB have been striving to reduce its manufacturing cost from equipment introduce, worker training and technology improvement to increase their profitability. Customers are satisfied with our cost savings but without quality loss.

5) Avoid hassle: It’s an upset matter when quality problem hassling you. Bicheng engineering design prevents problem from occurring in pre-production. You will not get headache with Bicheng prototypes, small orders and volume production. Our rate of customer complaint is less than 1% and will be solved satisfactory.

6) Save time: Market requires the products updating quickly. Bicheng PCB always works fast and flexible to save the time of production from prototype to standard production, 
quick turn-around or scheduled deliveries.

7) An excellent team: Bicheng is trustworthy partner with passion, discipline, responsibility and honesty. We have a team of experienced sales persons and skilled customer services. Do not change your supplier. If change is must, Bicheng is the right one for you.



  • UL : E251497


  • Delivery Port : HongKong

Packaging & Delivery

  • Packing :Vacuum
  • Packaging Size : 8 x 5 x 5  Centimeters
  • Package Weight :
  • Delivery Lead Time : 5-6 working days
  • Supply Ability : 45000 pieces per month

Product Image

  • 12 Layer Flex Printed Circuit Board (FPC) Built On Polyimide for Microstrip Antenna image 1
  • 2 2 Layer Flex Printed Circuit Board (FPC) Built On Polyimide for Microstrip Antenna image 2
  • 3 2 Layer Flex Printed Circuit Board (FPC) Built On Polyimide for Microstrip Antenna image 3
  • 4 2 Layer Flex Printed Circuit Board (FPC) Built On Polyimide for Microstrip Antenna image 4

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